Patents by Inventor Hideshi SHIMO

Hideshi SHIMO has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Semiconductor device and method for controlling body bias thereof
    Patent number: 11799475
    Abstract: A semiconductor device and a method for controlling body bias thereof capable of properly controlling body bias of a transistor even in a case where process variation occurs are provided. Operation speeds of ring oscillators ROSCn and ROSCp respectively change due to an influence of process variation at an NMOS transistor MN side and a PMOS transistor MP side. Speed/bias data represent a correspondence relationship between the operation speeds of the ring oscillators ROSCn and ROSCp and set values V1n and V1p of body biases VBN and VBP. A body bias controller receives speed values Sn and Sp measured for the ring oscillators ROSCn and ROSCp to which the body biases VBN and VBP based on default values are respectively applied, and obtains the set values V1n and V1p on the basis of the speed/bias data.
    Type: Grant
    Filed: September 8, 2022
    Date of Patent: October 24, 2023
    Assignee: Renesas Electronics Corporation
    Inventors: Hiroyuki Watanabe, Hideshi Shimo
  • SEMICONDUCTOR DEVICE AND METHOD FOR CONTROLLING BODY BIAS THEREOF
    Publication number: 20230081996
    Abstract: A semiconductor device and a method for controlling body bias thereof capable of properly controlling body bias of a transistor even in a case where process variation occurs are provided. Operation speeds of ring oscillators ROSCn and ROSCp respectively change due to an influence of process variation at an NMOS transistor MN side and a PMOS transistor MP side. Speed/bias data represent a correspondence relationship between the operation speeds of the ring oscillators ROSCn and ROSCp and set values V1n and V1p of body biases VBN and VBP. A body bias controller receives speed values Sn and Sp measured for the ring oscillators ROSCn and ROSCp to which the body biases VBN and VBP based on default values are respectively applied, and obtains the set values V1n and V1p on the basis of the speed/bias data.
    Type: Application
    Filed: September 8, 2022
    Publication date: March 16, 2023
    Applicant: Renesas Electronics Corporation.
    Inventors: Hiroyuki WATANABE, Hideshi SHIMO